<template>
  <div class="home-category">
    <ul class="menu">
      <li v-for="item in menuList" :key="item.id" @mouseenter="categoryId=item.id" >
        <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
        <template v-if="item.children">
          <router-link
            v-for="sub in item.children"
            :key="sub.id"
            :to="`/category/sub/${sub.id}`"
          >{{ sub.name }}</router-link>
        </template>
        <template v-else>
           <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
+          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
        </template>
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4 v-if="currCategory">
        {{ currCategory.id === 'brand' ? '品牌' : '分类' }}推荐
        <small>根据您的购买或浏览记录推荐</small>
      </h4>
      <ul v-if="currCategory&& currCategory.goods && currCategory.goods.length">
        <li v-for="item in currCategory.goods" :key="item.id">
          <RouterLink :to="`/product/${item.id}`">
            <img :src="item.picture" alt />
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{item.desc}}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { useStore } from 'vuex'
import { reactive, computed, ref, onMounted } from 'vue'
import XtxSkeleton from '@/components/library/xtx-skeleton.vue'
export default {
    name: "HomeCategory",
    setup(props) {
        const brand = reactive({
            id: "brand",
            name: "品牌",
            children: [{ id: "brand-children", name: "品牌推荐" }],
            goods: []
        });
        const store = useStore();
        const menuList = computed(() => {
            const list = store.state.category.list.map(item => {
                return {
                    id: item.id,
                    name: item.name,
                    // 防止初始化没有children的时候调用slice函数报错
                    children: item.children && item.children.slice(0, 2),
                    goods: item.goods
                };
            });
            list.push(brand);
            return list;
        });
        const categoryId = ref(null);
        const currCategory = computed(() => {
            return menuList.value.find(item => {
                return item.id === categoryId.value;
            });
        })
        return { menuList, currCategory, categoryId };
    },
    components: { XtxSkeleton }
}
</script>

<style scoped lang='scss'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover {
        background: $xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
            width: 95px;
            height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: $priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }
}
</style>